<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="jQuery.min.js"></script>
    <style>
        video {
            width: 80%;

        }
    </style>
</head>

<body>
    <video src="video/dongman.mp4" muted></video>
    <script>
        var myVideo = document.querySelector('video');
        //DOM对象转换为jQuery对象
        $('video');
        // $(myVideo).play();
        //jQuery 对象转换为DOm对象
        // $('Video')[0].play();
        $('video').get(0).play();
    </script>
</body>

</html>